Inscribed Right Triangle Theorem

CD is the diameter of Circle A. At the moment Triangle CED is a right triangle. Do the following below and see what happens:
1. Move point E around the circle. What happens to the triangle?
2. Move Point D around the circle. What happens to the triangle?
Answer the following questions.
1. If we move the right angle around the circle (Point E) does it change what kind triangle it is?
2. When you moved Point D around was it still a diameter or did that change?
3. When you moved Point D around what happened to the right angle?
4. In order for there to be a right triangle inscribed in a circle the hypotenuse has to be what?